1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/*
* Support PCI/PCIe on PowerNV platforms
*
* Currently supports only P5IOC2
*
* Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/msi.h>
#include <asm/sections.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/msi_bitmap.h>
#include <asm/ppc-pci.h>
#include <asm/opal.h>
#include <asm/iommu.h>
#include <asm/tce.h>
#include "powernv.h"
#include "pci.h"
/* For now, use a fixed amount of TCE memory for each p5ioc2
* hub, 16M will do
*/
#define P5IOC2_TCE_MEMORY 0x01000000
#ifdef CONFIG_PCI_MSI
static int pnv_pci_p5ioc2_msi_setup(struct pnv_phb *phb, struct pci_dev *dev,
unsigned int hwirq, unsigned int virq,
unsigned int is_64, struct msi_msg *msg)
{
if (WARN_ON(!is_64))
return -ENXIO;
msg->data = hwirq - phb->msi_base;
msg->address_hi = 0x10000000;
msg->address_lo = 0;
return 0;
}
static void pnv_pci_init_p5ioc2_msis(struct pnv_phb *phb)
{
unsigned int count;
const __be32 *prop = of_get_property(phb->hose->dn,
"ibm,opal-msi-ranges", NULL);
if (!prop)
return;
/* Don't do MSI's on p5ioc2 PCI-X are they are not properly
* verified in HW
*/
if (of_device_is_compatible(phb->hose->dn, "ibm,p5ioc2-pcix"))
return;
phb->msi_base = be32_to_cpup(prop);
count = be32_to_cpup(prop + 1);
if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) {
pr_err("PCI %d: Failed to allocate MSI bitmap !\n",
phb->hose->global_number);
return;
}
phb->msi_setup = pnv_pci_p5ioc2_msi_setup;
phb->msi32_support = 0;
pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n",
count, phb->msi_base);
}
#else
static void pnv_pci_init_p5ioc2_msis(struct pnv_phb *phb) { }
#endif /* CONFIG_PCI_MSI */
static struct iommu_table_ops pnv_p5ioc2_iommu_ops = {
.set = pnv_tce_build,
#ifdef CONFIG_IOMMU_API
.exchange = pnv_tce_xchg,
#endif
.clear = pnv_tce_free,
.get = pnv_tce_get,
};
static void pnv_pci_p5ioc2_dma_dev_setup(struct pnv_phb *phb,
struct pci_dev *pdev)
{
struct iommu_table *tbl = phb->p5ioc2.table_group.tables[0];
if (!tbl->it_map) {
tbl->it_ops = &pnv_p5ioc2_iommu_ops;
iommu_init_table(tbl, phb->hose->node);
iommu_register_group(&phb->p5ioc2.table_group,
pci_domain_nr(phb->hose->bus), phb->opal_id);
INIT_LIST_HEAD_RCU(&tbl->it_group_list);
pnv_pci_link_table_and_group(phb->hose->node, 0,
tbl, &phb->p5ioc2.table_group);
}
set_iommu_table_base(&pdev->dev, tbl);
iommu_add_device(&pdev->dev);
}
static const struct pci_controller_ops pnv_pci_p5ioc2_controller_ops = {
.dma_dev_setup = pnv_pci_dma_dev_setup,
#ifdef CONFIG_PCI_MSI
.setup_msi_irqs = pnv_setup_msi_irqs,
.teardown_msi_irqs = pnv_teardown_msi_irqs,
#endif
};
static void __init pnv_pci_init_p5ioc2_phb(struct device_node *np, u64 hub_id,
void *tce_mem, u64 tce_size)
{
struct pnv_phb *phb;
const __be64 *prop64;
u64 phb_id;
int64_t rc;
static int primary = 1;
pr_info(" Initializing p5ioc2 PHB %s\n", np->full_name);
prop64 = of_get_property(np, "ibm,opal-phbid", NULL);
if (!prop64) {
pr_err(" Missing \"ibm,opal-phbid\" property !\n");
return;
}
phb_id = be64_to_cpup(prop64);
pr_devel(" PHB-ID : 0x%016llx\n", phb_id);
pr_devel(" TCE AT : 0x%016lx\n", __pa(tce_mem));
pr_devel(" TCE SZ : 0x%016llx\n", tce_size);
rc = opal_pci_set_phb_tce_memory(phb_id, __pa(tce_mem), tce_size);
if (rc != OPAL_SUCCESS) {
pr_err(" Failed to set TCE memory, OPAL error %lld\n", rc);
return;
}
phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0);
phb->hose = pcibios_alloc_controller(np);
if (!phb->hose) {
pr_err(" Failed to allocate PCI controller\n");
return;
}
spin_lock_init(&phb->lock);
phb->hose->first_busno = 0;
phb->hose->last_busno = 0xff;
phb->hose->private_data = phb;
phb->hose->controller_ops = pnv_pci_p5ioc2_controller_ops;
phb->hub_id = hub_id;
phb->opal_id = phb_id;
phb->type = PNV_PHB_P5IOC2;
phb->model = PNV_PHB_MODEL_P5IOC2;
phb->regs = of_iomap(np, 0);
if (phb->regs == NULL)
pr_err(" Failed to map registers !\n");
else {
pr_devel(" P_BUID = 0x%08x\n", in_be32(phb->regs + 0x100));
pr_devel(" P_IOSZ = 0x%08x\n", in_be32(phb->regs + 0x1b0));
pr_devel(" P_IO_ST = 0x%08x\n", in_be32(phb->regs + 0x1e0));
pr_devel(" P_MEM1_H = 0x%08x\n", in_be32(phb->regs + 0x1a0));
pr_devel(" P_MEM1_L = 0x%08x\n", in_be32(phb->regs + 0x190));
pr_devel(" P_MSZ1_L = 0x%08x\n", in_be32(phb->regs + 0x1c0));
pr_devel(" P_MEM_ST = 0x%08x\n", in_be32(phb->regs + 0x1d0));
pr_devel(" P_MEM2_H = 0x%08x\n", in_be32(phb->regs + 0x2c0));
pr_devel(" P_MEM2_L = 0x%08x\n", in_be32(phb->regs + 0x2b0));
pr_devel(" P_MSZ2_H = 0x%08x\n", in_be32(phb->regs + 0x2d0));
pr_devel(" P_MSZ2_L = 0x%08x\n", in_be32(phb->regs + 0x2e0));
}
/* Interpret the "ranges" property */
/* This also maps the I/O region and sets isa_io/mem_base */
pci_process_bridge_OF_ranges(phb->hose, np, primary);
primary = 0;
phb->hose->ops = &pnv_pci_ops;
/* Setup MSI support */
pnv_pci_init_p5ioc2_msis(phb);
/* Setup TCEs */
phb->dma_dev_setup = pnv_pci_p5ioc2_dma_dev_setup;
pnv_pci_setup_iommu_table(&phb->p5ioc2.iommu_table,
tce_mem, tce_size, 0,
IOMMU_PAGE_SHIFT_4K);
/*
* We do not allocate iommu_table as we do not support
* hotplug or SRIOV on P5IOC2 and therefore iommu_free_table()
* should not be called for phb->p5ioc2.table_group.tables[0] ever.
*/
phb->p5ioc2.table_group.tables[0] = &phb->p5ioc2.iommu_table;
}
void __init pnv_pci_init_p5ioc2_hub(struct device_node *np)
{
struct device_node *phbn;
const __be64 *prop64;
u64 hub_id;
void *tce_mem;
uint64_t tce_per_phb;
int64_t rc;
int phb_count = 0;
pr_info("Probing p5ioc2 IO-Hub %s\n", np->full_name);
prop64 = of_get_property(np, "ibm,opal-hubid", NULL);
if (!prop64) {
pr_err(" Missing \"ibm,opal-hubid\" property !\n");
return;
}
hub_id = be64_to_cpup(prop64);
pr_info(" HUB-ID : 0x%016llx\n", hub_id);
/* Count child PHBs and calculate TCE space per PHB */
for_each_child_of_node(np, phbn) {
if (of_device_is_compatible(phbn, "ibm,p5ioc2-pcix") ||
of_device_is_compatible(phbn, "ibm,p5ioc2-pciex"))
phb_count++;
}
if (phb_count <= 0) {
pr_info(" No PHBs for Hub %s\n", np->full_name);
return;
}
tce_per_phb = __rounddown_pow_of_two(P5IOC2_TCE_MEMORY / phb_count);
pr_info(" Allocating %lld MB of TCE memory per PHB\n",
tce_per_phb >> 20);
/* Currently allocate 16M of TCE memory for every Hub
*
* XXX TODO: Make it chip local if possible
*/
tce_mem = memblock_virt_alloc(P5IOC2_TCE_MEMORY, P5IOC2_TCE_MEMORY);
pr_debug(" TCE : 0x%016lx..0x%016lx\n",
__pa(tce_mem), __pa(tce_mem) + P5IOC2_TCE_MEMORY - 1);
rc = opal_pci_set_hub_tce_memory(hub_id, __pa(tce_mem),
P5IOC2_TCE_MEMORY);
if (rc != OPAL_SUCCESS) {
pr_err(" Failed to allocate TCE memory, OPAL error %lld\n", rc);
return;
}
/* Initialize PHBs */
for_each_child_of_node(np, phbn) {
if (of_device_is_compatible(phbn, "ibm,p5ioc2-pcix") ||
of_device_is_compatible(phbn, "ibm,p5ioc2-pciex")) {
pnv_pci_init_p5ioc2_phb(phbn, hub_id,
tce_mem, tce_per_phb);
tce_mem += tce_per_phb;
}
}
}
|
